Figure 2.

Coagulative myocytolysis or contraction band necrosis or catecholamine necrosis (CN). Pancellular lesion involving the whole myocardial cell. A) histological view of a CN focus. B) ultrastructural hypercontraction with extremely short sarcomeres and highly thickened Z lines and focal myofibrillar rhexis. C) rupture of a hypercontracted myocell. EM view of pathological bands (D) formed by segments of hypercontracted and coagulated sarcomeres (intravenous infusion of catecholamines in dogs).